A lot of clothes dryers/tumblers have cheap threaded blower wheels that screw onto a motor shaft. Often, the wheel’s threads are stripped from constant thermal expansion. When hot enough (it’s delayed), there’ll be a loud noise of metal spinning inside metal. The motor could be dying too (running hotter than normal) since it has the stronger threads.
One temporary fix involves wrapping copper wire around the motor’s threads for friction.. at least while trying to think of a more “permanent solution” that does not involve buying/hoarding perfectly shaped blower wheels indefinitely.